IPSec Tunnel with xfrm interface

Hi 

Would like to check on the setup of IPSec tunnel with xfrm interface

i created a IPSec tunnel and configured the xfrm interface with IP address:

 HQ - 2.2.2.2/24

 remote 3.3.3.3/24

will i be able to ping the interface since the tunnel is up?

HQ Xfrm interface

Remote site xfrm

both site i had enable Ping

But i am not able to ping the interface of the xfrm from either firewall from the opposite sites.

Please help to advise.

Thanks and Regards

Ben